CMake: Unify Qt configuration; require Qt 5.5.1

GUI/ba3d/CMakeLists.txt

@@ -9,12 +9,6 @@ if(CMAKE_COMPILER_IS_GNUCXX)
     add_compile_options(-Wall -Wextra -Wpedantic)
 endif()
 
-find_package(Qt5 REQUIRED COMPONENTS Core Gui Widgets OpenGL)
-
-if(${Qt5Core_VERSION} VERSION_LESS "5.5.1")
-    message (FATAL_ERROR "Qt 5.5.1+ is required, have ${Qt5Core_VERSION_STRING}")
-endif()
-
 set(include_dirs ${CMAKE_CURRENT_SOURCE_DIR})
 include_directories(${include_dirs})
 

cmake/bornagain/modules/SearchQt.cmake

@@ -9,16 +9,9 @@ find_package(Qt5Svg REQUIRED)
 
 message(STATUS "Found Qt5 version ${Qt5Widgets_VERSION}")
 
-if(${Qt5Widgets_VERSION_MINOR} LESS 4)
-    message(FATAL_ERROR "Qt5 version 5.4 required")
-endif()
-
-# checking 3D
-if(BORNAGAIN_OPENGL)
-    if(${Qt5Widgets_VERSION_MINOR} LESS 5)
-        message(WARNING "3D in BornAgain requires Qt=5.5.1+. Switching 3D support off: BORNAGAIN_OPENGL=OFF.")
-        set(BORNAGAIN_OPENGL OFF)
-    endif()
+if(${Qt5Core_VERSION} VERSION_LESS "5.5.1")
+    # required for OpenGL, hence for ba3d
+    message (FATAL_ERROR "Qt 5.5.1+ is required, have ${Qt5Core_VERSION_STRING}")
 endif()
 
 if(BORNAGAIN_OPENGL)